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ath10k: fix ar->rx_channel updating logic

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Channel contexts aren't iterable until after
they've been added to the driver. The code assumed
otherwise.

This problem could result in:

 * rx_channel being NULL and forcing Rx path to go
   the slow way to get channel on QCA988X,

 * report incorrect channel when running
   multi-channel on QCA61X4 hw2.1,

 * report incorrect channel after AP channel
   switch.

Fixes: 500ff9f938 ("ath10k: implement chanctx API")
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior 2015-06-03 12:16:54 +02:00 committed by Kalle Valo
parent b72436c430
commit d7bf4b4aba
1 changed files with 17 additions and 5 deletions
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22
drivers/net/wireless/ath/ath10k/mac.c
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@ -6144,7 +6144,10 @@ static int ath10k_ampdu_action(struct ieee80211_hw *hw,
}
static void
ath10k_mac_update_rx_channel(struct ath10k *ar)
ath10k_mac_update_rx_channel(struct ath10k *ar,
struct ieee80211_chanctx_conf *ctx,
struct ieee80211_vif_chanctx_switch *vifs,
int n_vifs)
{
struct cfg80211_chan_def *def = NULL;
@ -6154,6 +6157,9 @@ ath10k_mac_update_rx_channel(struct ath10k *ar)
lockdep_assert_held(&ar->conf_mutex);
lockdep_assert_held(&ar->data_lock);
WARN_ON(ctx && vifs);
WARN_ON(vifs && n_vifs != 1);
/* FIXME: Sort of an optimization and a workaround. Peers and vifs are
* on a linked list now. Doing a lookup peer -> vif -> chanctx for each
* ppdu on Rx may reduce performance on low-end systems. It should be
@ -6165,11 +6171,17 @@ ath10k_mac_update_rx_channel(struct ath10k *ar)
* affected much.
*/
rcu_read_lock();
if (ath10k_mac_num_chanctxs(ar) == 1) {
if (!ctx && ath10k_mac_num_chanctxs(ar) == 1) {
ieee80211_iter_chan_contexts_atomic(ar->hw,
ath10k_mac_get_any_chandef_iter,
&def);
if (vifs)
def = &vifs[0].new_ctx->def;
ar->rx_channel = def->chan;
} else if (ctx && ath10k_mac_num_chanctxs(ar) == 0) {
ar->rx_channel = ctx->def.chan;
} else {
ar->rx_channel = NULL;
}
@ -6204,7 +6216,7 @@ ath10k_mac_op_add_chanctx(struct ieee80211_hw *hw,
spin_lock_bh(&ar->data_lock);
ath10k_mac_chan_ctx_init(ar, arctx, ctx);
ath10k_mac_update_rx_channel(ar);
ath10k_mac_update_rx_channel(ar, ctx, NULL, 0);
spin_unlock_bh(&ar->data_lock);
ath10k_recalc_radar_detection(ar);
@ -6228,7 +6240,7 @@ ath10k_mac_op_remove_chanctx(struct ieee80211_hw *hw,
mutex_lock(&ar->conf_mutex);
spin_lock_bh(&ar->data_lock);
ath10k_mac_update_rx_channel(ar);
ath10k_mac_update_rx_channel(ar, NULL, NULL, 0);
spin_unlock_bh(&ar->data_lock);
ath10k_recalc_radar_detection(ar);
@ -6413,7 +6425,7 @@ ath10k_mac_op_switch_vif_chanctx(struct ieee80211_hw *hw,
*/
arctx_old->conf = *vifs[i].new_ctx;
}
ath10k_mac_update_rx_channel(ar);
ath10k_mac_update_rx_channel(ar, NULL, vifs, n_vifs);
spin_unlock_bh(&ar->data_lock);
/* FIXME: Reconfigure only affected vifs */